When the placed concrete has develo

When the placed concrete has developed sufficient compressive strength a compressive force is imparted to it by releasing the tendons, so that the concrete member is in a permanent state of prestress.

Results (Chinese) 1:

当放置的混凝土已发展足够的抗压强度压缩力被传授给它通过释放肌腱，以便在永久状态的预应力混凝土构件。

Results (Chinese) 2:

当置于混凝土已开发足够抗压强度的压缩力被释放筋赋予它，使得混凝土构件处于预应力的永久状态。

Results (Chinese) 3:

当放置的混凝土产生足够的抗压强度时，通过释放筋来施加一个压力，使混凝土构件处于一种永久的预应力状态。